Most DVD copying users use a popular decrypter called DVD43. Up until the
last few months, DVD43 did a reasonably good job of not only decrypting, but
also removing some new forms of “copy protection” such as Arccos. However, DVD43 fell way
behind in its ability to deal with copy protection on new DVD releases and
has now stopped handling copy protection schemes like Arccos. This
caused a lot of grief for users of DVD copy
software which depend on this third party decrypter to handle copy
protection.

At this time the most recent version of DVD43 (version
3.8.0) is now just a simple decrypter, which only removes CSS and
Macrovision copy protection, something it does well.

Before explaining what CPRx (Copy Protection Removal) technology is and how it works, you need to
understand how DVD “copy protection” is used. According to the DVD
specification, there are two types of copy protection available:

Content Scrambling System (CSS) - Almost all DVDs are encoded with
CSS, which is a digital encryption scheme. DVD players can play DVDs
encrypted with CSS because they each have a key to unlock the information on
the DVD. Another way to think of CSS is a locked door. DVD players can
unlock the door. Similarly, a software decrypting program can unlock the DVD
and permit to a DVD copy application.

Macrovision - Many DVDs contain Macrovision, an analog copy
protection. When a DVD player plays a DVD encoded with Macrovision, the DVD
player will output a video signal which is incompatible with analog recoding
devices, such as VHS tape recorders. Macrovision is not a digital
protection, so it has no effect on software which is designed to copy a DVD.

Most mainstream DVD copy applications depend on third party decrypting
applications to remove CSS and Macrovision from the DVD. The removal is done
on the fly (while copying takes place) by tools like DVD43 or DVDFab HD
Decrypter, or as a separate process which rips
the DVD contents to a hard drive folder (using tools like DVD Decrypter)
prior to the DVD being copied. Both CSS and Macrovision are static entities
which cannot change. If they could change, hundreds of millions of DVD
players would not know how to play the modified DVDs. So this brings up a
couple of interesting questions. Why do a lot of new DVD releases now claim
to be “Copy Protected”? What is this new copy protection and how does it
affect a DVD copy application?

The fact is there are no new “copy protections”. To create a new copy
protection, you would also have
to change the way a DVD player works.

DVD players must all conform to rigid
specifications to ensure proper playback. A new copy protection cannot be
introduced unless the DVD player specification changes.

You can however author a DVD (the process of writing the original DVD) in
such a way as to make it difficult to copy if you exploit weaknesses in the
design of DVD copy software. A great deal of effort has been spent on trying
to make new DVD movies difficult to copy, but still playable on a DVD
player. Some simple examples are the inclusion of bad sectors (defects
analogous to scratches) or bad DVD structure (adding bogus content to a DVD)
which are blatant attempts to inhibit archival programs from making backup
copies of the DVD.

Marketing names have been assigned to many of these novel authoring
techniques, most notably “Sony Arccos, Macovision Rip Guard, Settec
Alpha-DVD and Augs Puppet Lock. None of these authoring techniques
constitute real copy protection, simply because the DVD player is totally
unaware of their existence and as such, they are only annoyances to DVD copy
applications. If you attempt to copy a DVD which incorporates one of these
authoring techniques, it may fail during the copy process (often due to bad
sectors on the disc) or it may fail to play back correctly because of bad
DVD authoring on the original. One solution is to use a DVD copy application
like 1 Click DVD Copy or 1 Click DVD Copy PRO which
incorporates CPRx error correction technology.

Most other DVD copying software claim to be able to
copy ALL the latest DVD movies, but are they telling you the truth? Beware
of companies selling DVD software rip-offs that can't copy even half the
time.

CPRx technology is an innovative solution for copying new DVD movies which
have bad sectors or bad DVD structure. Users of 1 Click DVD Copy and 1 Click DVD Copy PRO have access
to frequent updates via internet download to ensure they retain this
capability. Users must continue to use a third party decrypting application
such as DVD43 or DVDFab HD
Decrypter to “unlock the
door” to the DVD, but once the door is open, the software can now ensure the
highest level of success when making a backup copy of a DVD movie.
CPRx
technology also helps to ensure that the DVD will play back correctly on
your home DVD player, something which is often overlooked until it’s time to
watch the backup copy.